Blast furnace gas washer



Sept. 21, 1954 P. ERICSON 2,689,715

BLAST FURNACE- GAS WASHER Filed Nov. 23, 1951 INVENTO-R. 33 Paaffiiason zsheets -snaet 1 P. "ERICSQN BLAST FURNACE GAS WASHER Sept. 21, 19 54 2 Sheets-Sheet 2 Filed NOV; 25, 1951 llilllll s PE? It'lfllllilllll INVENTOR. 1377629077 W- PaZzZ ATTD RNEYB Patented Sept. 21, 195 4 UNITED STATES PATENT OFFICE BLAST FURNAoE Gas WASHER Paul Ericson, Hanlin Station, Pa. A plication November 23, 1951, serial No. 257,758

This invention relates to devices for washing gases of blast furnaces to remove dust and other foreign matter suspended in the gases, and in particular a washer wherein water is sprayed over or into gases passing downwardly through a neck on the upper end of the washer and wherein the gases pass from the neck through overlapping baffles in a casing and are removed from outlets in an open upper part of achamber at the lower end with dust removed from the gases and the water being washed out of the lower part of the washer through a water seal. The purpose of this invention is to provide an improved gas furnace gas washer wherein the gases are circulated back and forth through overlapping and staggered baliles and in which the gases are washed continuously as they pass through the device.

Various devices have been provided for drawing furnace gases through water and other filtering agents, however, it has been found that it is not suflicient to merely spray water into the gases, or force the gases to pass through a bath of water and with this thought in mind this invention contemplates a washer in the form of a vertically disposed housing with an entrance heck extended from the up er end and in which the housing is'provided with a series of over lapping conical shaped baffles through which the gases are forced to pass upwardly and outwardly and in which the gases are washed with water sprayed from the walls of the neck and also into the gases as they approach spray nozzles at the sides of the housing and also as they leave the nozzles. By this means the gases are forced into sprays and also sprayed as they travel away from the spray nozzles. i

The object of this invention is, therefore, to provide an improved blast furnace gas washer in which the gases are not only washed but are forced upwardly into spraying devices and are also washed as they travel away from said spraying devices whereby all foreign matter is forced from the gases.

Another object of the invention is to provide a gas washer in which the gases are washed continuously in passing through the washer and in which the gases are removed from an open chamber in the lower end of the washer with foreign matter originally suspended in the gases removed from the lower part of the chamber through a water seal.

A further object of the invention is to provide an improved as washer wherein gases pass back and forth through a series of overlapping 4 Claims. (Cl. 261-=-111) bafiles and are sprayed with water in each step which is of a comparatively simple and economispra ed continuously as they pass through thehousing.

Other features and advantages of the invention will appear from the following description taken in connection with the drawings wherein:

Figure 1 is a plan view of the improved gas washer with inlet and outlet tubes extended therefrom shown in section.

Figure 2 is a vertical cross section through the gas washer taken on line 2-2 of Figure 1.

Figure 3 is a sectional plan through the washer taken on line 3 3 of Figure 2.

Referring now to the drawings wherein like reference characters denote corresponding parts the improved gas washer of this invention includes a cylindrical housing In having an en'- larged compartment H at the lower end, a neck 12 extended upwardly from the upper end and an outlet connection It extended from a discharge tube and positioned with the outer end thereof extended above the water level in the compartment I I whereby a seal is provided, and the interior of the housing [0 is provided with conical shaped centrally positioned bafiles I5, frusto-conical shaped baffles l6, spray noz- I8 and IS in the neck l2 and similar spray nozzles 20 in the housing I 0.

The neck I2 of the housing is provided with a gas inlet connection 2] and the lower end of the neck is provided with an inwardly extended frusto-conical shaped baffle 22 which crowds gases inwardly whereby the gas is passed through an opening or throat 23.

From the. opening 23 the gases pass into a conical shaped baffle 24, from the baffle 24 the gases pass upwardly and outwardly into an area 25 from which the gases pass inwardly along the upper surface of the frusto-conical baffie 26 and through the opening or throat 21 thereof.

From the opening 21 the gases pass into the upper conical shaped bafile I 5 which, like the bafile 24 forces the gases upwardly and outwardly whereby they pass around the outer edge and backwardly, passing over the upper surface of the frusto-conical shaped baflle 16 which extends inwardly from the outer wall of the housing.

This action is continued with the gases passing inwardly and downwardly and outwardly and upwardly around the baflles until they pass over the edge of the conical shaped bafile 28 from which they pass through a channel 29 and inwardly and downwardly over a frusto-conical shaped wall 30. From this wall the gases follow a path of the arrows 3|, passing through the compartment H and upwardly out of the discharge connection 32.

' Gases entering the neck I2 through the connection 2! are sprayed with water by the spray nozzle I1, 18 and I9 and as the gases pass through stages between the conical shaped baffles in the housing l9 they are sprayed continuously with spray nozzles 20, the gases being sprayed coming toward the nozzles and also as they leave the nozzles and pass downwardly through the channels between the baffles.

The washed gases pass outwardly through the connection 32 to a common gas line and thedust and other foreign matter washed from the gases passes, with the water, downwardly through the openings 33 in the bafile 24 and through following openings 34 in the centers of the bafiles IS. The size of the openings 33 and 34 being substantially less than the openings around the ends of the baffles the gases take the path of least resistance, and pass around the bailies instead of attempting to pass through the openings at the center.

The inner edges of the bafilesare supported by studs 35 and the lower conical shaped bafile 28 is provided with a restricted throat 3B which provides communicating means between the interior of the bafile and a tube 31 which extends into liquid as indicated by the numeral 38 in the lower part of the compartment II.

The housing I is provided with a plurality of clean-out doors 39 through which the interior of the housing may be cleaned when the washer is not in operation.

Water is supplied to the spray nozzles through a supply pipe 40 which may extend through suitable means for providing water under pressure.

It will be understood that modifications may be made in the design and arrangement of the parts without departing from the spirit of the invention.

What is claimed is:

1. A gas washer comprising a vertically disposed housing having a gas inlet neck at the upper end and an enlarged outlet compartment at the lower end, a plurality of annular spray nozzles positioned in said neck, a series of staggered inclined baflles positioned in the housing extended outwardly and upwardly from the center and inwardly and downwardly from the outer wall, said baflles extended outwardly and upwardly from the center and having comparatively small center openings, and the baffles extended inwardly and downwardly from the outer wall positioned between the bafiles extended outwardly and upwardly from the center and terminating in an annular ring positioned substantially midway between the center and outer wall of the housing, annular spray nozzles positioned around the interior of the housing for spraying water between the bafiies, and suitable gas outlet connections extended from the upper part of the compartment at the lower end of the housing and a water and sediment removing outlet extended from the lower part of the compartment and positioned whereby water therein provides a seal preventing the escape of gas therefrom.

2. A gas washer as described in claim 1, where- V in the gases are sprayed with water as they approach the water spray nozzles on the inner surface of the outer wall of the housing and also as they travel away from said spray nozzle.

3. A gas washer as described in claim 1, wherein clean-out doors are provided at spaced intervals on the housing.

4. A gas washer comprising a housing having a gas inlet neck at the upper end and anenlarged outlet compartment at the lower end,

spray nozzles positioned in said neck, a series ofstaggered inclined baflles positioned in the housing extended outwardly and upwardly from the center and inwardly and downwardly from the outer wall, said baflies extended outwardly and upwardly irom the center and having center openings, and the baiiles extended inwardly and downwardly from the outer wall positioned between the bafiles extending outwardly and upwardly from the center and terminating in an annular ring, spray nozzles positioned around the interior of the housing for spraying water between the baffles, and gas outlet connections extended from the upper part of the compartment at the lower end of the housing, and a water'and sediment removing outlet extended from the lower part of the compartment and positioned whereby water therein provides a seal preventing the escape of gas therefrom.

' References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,661,265 Olbricht Mar. 6, 1928 1,878,582 Hellmer Sept. 20, 1932 1,985,010 Berkhuljsen Dec. 18, 1934 2,214,932 Merlis Sept. 17, 1940 2,349,777 Utterback et al. May 23, 1944 2,388,344 Sebald Nov. 6, 1945 FOREIGN PATENTS Number Country Date 5,773 Great Britain Mar. 18, 1905 24,598 Great Britain Dec. 24, 1914 

